Heating and cooling systems

ABSTRACT

A high-velocity ducted air-type heating and/or cooling system wherein heated or cooled conditioned air is introduced into each of the rooms or spaces to be conditioned by a terminal nozzle in each room defining a smooth exit orifice which is free of diffusing or flow disturbing surfaces and is located in a boundary surface of the room, for example, the floor or ceiling. The orifice is directed perpendicular to the surface in which the nozzle is mounted to discharge a smooth unencumbered, sound attenuated, quiet stream of conditioned air a sufficient distance toward the opposite bounding surface to induce intermixing circulation of room air with the conditioned air in such manner that the entire room becomes a mixing box or chamber. A direct coupled or contiguous sound attenuator is provided immediately upstream of the outlet to permit this high discharge velocity without creating objectional noise.

United States Patent Continuation of application Ser. No. 690,253, Dec. 13, 1967, now abandoned.

HEATING AND COOLING SYSTEMS 12 Claims, 7 Drawing Figs.

US. Cl 165/1, 165/49, 98/40 Int. Cl F24h 9/08 Field of Search 165/49, 50, 135; 98/40,l04

References Cited UNITED STATES PATENTS 2,932,956 4/1960 Chieregatti 165/135 8/1965 Brandi 98/33 Primary ExamineF-Charles Sukalo Attorney-Mason, Fenwick & Lawrence ABSTRACT: A high-velocity ducted air-type heating and/or cooling system wherein heated or cooled conditioned air is introduced into each of the rooms or spaces to be conditioned by a terminal nozzle in each room defining a smooth exit orifice which is free of diffusing or flow disturbing surfaces and is located in a boundary surface of the room, for example, the floor or ceiling. The orifice is directed perpendicular to the surface in which the nozzle is mounted to discharge a smooth unencumbered, sound attenuated, quiet stream of conditioned air a sufficient distance toward the opposite bounding surface to induce intermixing circulation of room air with the conditioned air in such manner that the entire room becomes a mixing box or chamber. A direct coupled or contiguous sound attenuator is provided immediately upstream of the outlet to permit this high discharge velocity without creating objectional noise.

PATENTEDIAPR'ZQIQYI 7 3,575,234

' sum 1 or 3 INVENTOR J HN I. DmcKMANN ATTORNEYS PATENTEDAPMOISH 3,575,234

SHEET 2 OF 3 I NVENTOR JOHN S'- DiECKMANN m m iwQgcbw 3mm ATTORNEYS HEATING AND COOLING SYSTEMS This application is a continuation of my earlier application, Ser. No. 690,253, filed Dec. 13, 1967 and now abandoned.

The present invention relates in general to comfort conditioning systems for heating and/or cooling of rooms or building spaces, and more particularly to a high-velocity ducted air-type heating and cooling system, wherein heated or cooled air is conveyed from a source of conditioned air, such as a central heating and cooling unit, through terminal nozzles in the ceiling, floor or walls of the rooms to be served and discharged in an undiffused, unencumbered quiet, soundattenuated stream of air which, using the room itself as a mixing chamber, produces sufiicient circulation of air in the room to maintain appropriate temperatures at acceptable noise levels.

Air distribution systems for heating or cooling air in rooms have customarily introduced the conditioned air into the room through registers or grills of either the low-velocity type or the high-velocity diffusing type. The use of discharge registers or grills has been subject to a number of recognized disadvantages, including the often unsightly, space-consuming and sometimes objectionably noisy characteristics of such terminal registers or grills, the limitations on furniture location imposed by many registers and grills the dirt-collecting characteristics of these devices, and the noise sometimes created by them, especially by airflow across the diffusing surfaces and edges when diffusing registers are used with highvelocity air systems.

High-velocity duct systems have been previously known in the art, such as the high-velocity system used principally for large buildings and generally known as an induction system, which conditions a relatively small amount of air in a central plant and circulates it at a high velocity to individual terminal units where jets or air induce a large volume of air from the room through heat exchange coils which either heat or cool the induced air and discharge it back into the room. However, these well-known induction systems involve adding heat to or taking heat from the circulating air in the terminal device, and the heating or cooling of the room is accomplished by the heat exchange coils in the individual terminal units.

Other systems have been devised, such as are disclosed in U.S. Pat. Nos. 2,579,507; 2,770,445 and 3,181,793 to C. D. MacCracken, wherein conditioned air from a central source of conditioned air is conveyed to nozzles in registerlike terminal units having room air inlets and outlets, to induce flow of room air into the register for mixture with the conditioned air discharged from the nozzles within the register and return of the air mixture to the room. Such units, of course, still have the objection of the cumbersome noisy terminal units arising from the airflow across the diffusing surfaces and edges, the aesthetic objection to the appearance of the diffusing registers, involve diffusion of the delivered air at the terminal register, and are relatively high in cost.

Where attempts have been made to use high-velocity systems that directly, discharge into the room without any .register or terminal unit, they have been seriously limited by high, unacceptable noise levels, primarily due to selfgenerated noise from the duct system upstream of the outlet. Attempts to use duct-mounted silencers or upstream attenuating means have not proven satisfactory and have been more cumbersome than conventional diffusers and the need for a quiet operating system has become very evident. Sound level measurements of operating noise levels of such systems have shown that greater attenuation and improvement is necessary to be acceptable to homeowners. The desired results of comfort and noise are secured by the present invention with a combination of an unencumbered orifice which is essentially the same diameter as the connecting ductwork with a directly coupled attenuator contiguous to that orifice so designed as to give sufficient attenuation without imposing excessive pressure drop or turbulence that would inhibit the circulation in the room by significantly reducing discharge velocity. The simplicity of such an outlet opening and direct coupled attenuator is an obvious advantage over the more cumbersome diffusing and attenuating devices.

An object of the present invention is the provision of an improved system for cooling and/or heating rooms and other occupied spaces, wherein conditioned air derived from a conditioning source, such as a central conditioning unit, is circulated at high velocity to terminal nozzle fittings which may be placed in the ceiling, floor or walls of the rooms to be served and discharge a quiet, sound-attenuated, undiffused stream of air into the room in such manner that the entire room becomes a large mixing chamber, wherein moderate flow of substantially all the air in the room is induced at acceptable noise levels.

Another object of the present invention is the provision of a novel heating and cooling system of the type described in the immediately preceding paragraph, wherein there is no diffusion of the conditioned air delivered into the room through the terminal nozzles, but rather the conditioned air is quietly discharged into the room in an unencumbered, smooth flowing stream, so that its kinetic energy is conserved until it reaches a substantial distance into the room where it quietly induces flow of substantially all of the air in the room.

Another object of the present invention is the provision of a novel heating and cooling system of the high-velocity air type, wherein the treated air is discharged into the room in a quiet, sound-attenuated, undiffused airstream through terminal nozzles without diffusing registers or grills, which system has the performance characteristics of high-velocity induction systems, but at lower cost.

Other objects, advantages and capabilities of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings illustrating a preferred embodiment of the invention.

IN THE DRAWINGS FIG. 1 is a somewhat diagrammatic, fragmentary perspective view of a typical basement installation of a heating and cooling system embodying the present invention, showing representative conduits and terminal nozzles for conveying high-velocity conditioned air to the rooms and discharging the same into the rooms from the floors thereof;

FIG. 2 is a diagrammatic perspective view of a typical attic installation for such a heating and cooling system;

FIG. 3 is a fragmentary perspective view, to enlarged scale, of a sound-attenuated terminal nozzle unit installed in a floor of a room adjacent the corner of the room;

FIG. 4 is a vertical section view through a sound-attenuated terminal nozzle unit used in the present invention, installed in the ceiling of a room; and 7 FIGS. 5, 6 and 7 are diagrammatic elevation views of a room illustrating respectively the air circulation patterns for a floor installation, a ceiling installation, and a wall installation of the sound-attenuated terminal nozzles.

Referring to the drawings, wherein like reference characters designate corresponding parts in the several FIGS., the highvelocity air heating and/or cooling system of the present invention comprises a heating and cooling generator 10, which may be formed of known types of thermal airconditioning devices designed to supply heat to or extract heat from air derived from a suitable return inlet and discharge the same at high velocity to an outlet, as indicated at 10a, for delivery through conveyor ducts or trunks to the space to be served. Such a heating and/or cooling generator may be of the type disclosed in U.S. Pat. No. 2,770,445, to C. D. MacCracken. As illustrated in FIG. I, in the typical basement installation of the heating and cooling system, the heating and cooling generator 10 is located in the basement space 11 of the building and the conditioned air discharged from the outlet 10a is conveyed through a suitable ducting system, here shown as the main trunk duct 12 running beneath the floor of the first floor level of the building and having a plurality of smaller diameter branch ducts 13 extending therefrom to appropriate locations in the building to discharge the air at floor level into the rooms at the first floor level 14 and the second floor level 15 of the building, and to discharge air at ceiling level downwardly into the basement space 11 of the building. The main trunk duct 12 forms the plenum for the system and may, for example, be formed of 7-inch internal diameter fiberglass tubing, preferably having vapor barrier means on its exterior, such as a covering aluminum sheet or foil material. The branch ducts 13 should be well insulated to maintain properly the relatively high and low temperatures of the conditioned air circulated therethrough and should be airtight and moisture proof to absolutely prevent leakage of the high-temperature air and prevent moisture from accumulating inside the insulation when cold air passes through the ducts. As one particular example which is of suffieiently small cross section and character to facilitate convenient running of the branch ducts inside standard 2-inch by 4-inch stud partitions, the branch ducts 13 may be approximately 2-inch inner diameter flexible tubing having a core formed of spirally wound metallic strip covered by insulating material, preferably fiberglass wool of high density an an outer covering of woven fiberglass fabric coated with thermoplastic or thermosetting material such as neoprene, as disclosed in said earlier MacCracken US. Pat. No. 2,770,445.

These branch ducts 13 each feed into sound attenuator sections which may be alternatively constructed as depicted in FIG. 3 or FIG. 4, which are connected to terminal nozzle fittings 16, designed to discharge a smooth, unencumbered, quiet, sound-attenuated stream of air in a vertical direction at a velocity which will move the expanding stream of air slightly less than the vertical height of the room. These terminal nozzle fittings may be simply a ring or annulus defining a circular discharge opening 17 at the floor level of the room to be served with the axis of the circular discharge opening 17 lying vertically. In one form, illustrated diagrammatically in FIG. 3, the terminal fitting 16 comprises a simple annular cover plate 18 secured to the floor by screws or other conventional fastening means having a substantially cylindrical boss or inner flange 18' extending axially downward therefrom defining the generally round exit orifice 17. To this is connected a right-angular or elbow section of tubing having a horizontal leg 19' connected to the horizontally extending branch duct 13 and a vertical leg 19" connected to the boss or flange 18' and terminating in the circular discharge opening 17. The elbow tube 19', 19", is preferably surrounded with an outer jacket 20, for example, of coated fiberglass cloth over fiberglass insulation, and is formed as a sound attenuator indicated generally by reference character 19, for example, by forming the portion of the horizontal leg 19' of the elbow tube of perforated metal tubing, surrounded by fiberglass, to provide sound absorption.

Another form of terminal nozzle fitting which may be used is illustrated in FIG. 4 and indicated by the reference character 16', and comprises a terminal fitting cap 23, here shown as a plastic member having a somewhat frustoconical inner tubular flange or coupling neck portion 24 defining an outwardly flaring bore terminating in the discharge opening 17, a circular faceplate portion 25 joined to and projecting outwardly from the exit end of the coupling neck portion 24, and an outwardly spaced cylindrical flange portion 26 projecting a short distance in the same direction from the faceplate portion 25 as the neck 24 in coaxial relation with the axis of the neck portion 24. The faceplate portion 25 has a circular outer perimeter of somewhat larger diameter than the flange 26 and has an inwardly projecting cylindrical lip formed at the perimeter. This terminal fitting cap 23 is designed to be inserted in a circular opening cut in the floor (or in the ceiling installation) of sufficient size to accommodate the neck 24 and flange 26 and to be secured by suitable screws 27 to the floor or ceiling. The branch duct 13 is designed to be fitted over the coupling neck portion 24 of the terminal fitting cap 23 and clamped thereto, as by a tubing clamp 28.

. the tubing clamp 28, and the outer jacket 32 is taped to the flange 26 to provide an airtight seal. The other end of the sound-attenuating tubing is suitably connected in a known manner to the end of the branch duct 13.

A typical attic installation of the present invention is illustrated in FIG. 2, wherein the parts are designated by the same reference characters as employed in connection with the system of FIG. 1. It will be seen that in an attic installation, the system is substantially the same as the basement installation, except that the heating and cooling generator 10 and the main trunk duct 12 and the branch ducts 13 are all located in the attic space, and the terminal nozzle fittings 16 are located in the ceilings of the rooms to be served to direct the discharged airstream downwardly in a vertical direction into the room.

Since the terminal nozzle fittings 16 discharge a jet of air into the room to be served, it is desirable to locate them where there are no large pieces of furniture, above or below, and out of normal traffic patterns or away from where people may be seated. By proper design of the terminal nozzle fittingsand the contiguous attenuator and proper location thereof in the floor, ceiling or wall of the room, sufficient circulation of the air in the room can be produced to maintain very slight temperature differences between the warmest and coolest parts of the room and at the same time not create objectionable draft across floors or objectionable noise. As is diagrammatically illustrated in FIGS. 5, 6 and 7, the operation of the discharge nozzle fittings 16 in either the floor, ceiling or wall is to direct a smooth-flowing stream of the conditioned air in a vertical direction, either upwardly or downwardly or in a horizontal direction, in such manner as to conserve the energy of the stream until it reaches a sufficient distance into the room, as indicated diagrammatically by the arrows 31, into intermingling relation with the discharged conditioned airstream and thereby affect conditioning of all the air in the room. I have found that this system produces adequate circulation of the air in the room to maintain uniform distribution of desired temperature conditions, without resorting to more vigorous circulation of only a small part of air in the room as in the case with diffusing terminal devices. Air circulation produced by the terminal nozzle fitting is effective, whether the terminal nozzle is located near inside or outside walls. I have found that these terminal nozzle fittings work effectively when located as close as 4 inches to the wall, so that there need be no limiting interference with furniture location or other use of the room. One preferred position appears to be in the corners of the room near the outside wall, although corner locations on inside walls or middle-of-wall locations are satisfactory. Since corners are seldom occupied close to the wall, this has been found to be a very desirable location for the terminal nozzle fittings. In a satisfactory embodiment of the invention, I have used discharge nozzles of generally round configuration having cross-sectional areas of from 1.4 to 3.8 square inches, located preferably approximately 4 to 18 inches from the wall in corners of the rooms to be served. Larger nozzles may cause drafts and small nozzles may become too costly because of the multiplicity of nozzles required. The use of a cooling and heating generator capable of cooling air to the range of 32 F to 60 F. and delivering it at a pressure of 0.90 inches to 2.1 inches of water to the main trunk duct 12 forming the plenum system and capable of heating air to temperatures of 220 F. to 350 F. and delivering the same at like pressures produce satisfactory results.

It will be apparent that various modifications of the present invention may be made within the spirit and scope of the invention, and it is desired therefore that only such limitations be placed thereon as are imposed by the prior art and set forth in the appended claims.

lclaim:

l. A method of obtaining an essentially uniform desired temperature throughout a room at an acceptable noise level without requiring air withdrawal means associated with the room, said method consisting of supplying conditioned air through an air supply duct system, injecting conditioned air from said duct system into the room solely as a single, soundattenuated, undiffused, concentrated stream issuing from an unobstructed and unencumbered discharge opening in one of the bounding surfaces forming the floor, ceiling and walls of the room with the conditioned air being at a temperature substantially different from said desired temperature, said opening having the same cross-sectional area and configuration as the air supply duct connected thereto, acoustically attenuating the airflow to said opening immediately upstream of and contiguous to the opening while the fiow is maintained as a uniform cross section flow stream without abrupt directional changes, transition, expansion or contraction, and issuing said acoustically attenuated flow stream from said opening as said concentrated airstream at a sufficient velocity to induce an air circulation pattern in the room solely by means of the concentrated airstream which effectively mixes conditioned air from said concentrated airstream with air in the room effectively using the room as a mixing box to achieve a substantially uniform temperature and acoustically acceptable noise level throughout the room.

2. The method of claim 1 wherein said conditioned air is supplied from a plenum system which is maintained at a pressure of between 0.90 to 2.1 inches of water.

3. The method of claim 2 wherein said conditioned air is in a temperature range of between 32 F. to 60 F 4. The method of claim 2 wherein said conditioned air is in a temperature of between 220 F. to 350 F.

5. The method of claim 1, wherein the cross-sectional area of said concentrated airstream at said opening is about 1.4 to 3.8 square inches.

6. A high-velocity ducted air-type conditioning system for acoustically acceptable comfort conditioning of each of a plurality of rooms each having boundary surfaces forming the floors, ceilings, and walls thereof wherein the sole supply of conditioned air in each room is a concentrated stream of such conditioned air introduced into each room through a soundattenuated outlet located in any of said boundary surfaces; the system comprising generator means for generating selectively conditioned air and pressurizing the same to form a single source of pressurized, conditioned air at a selected pressure within the range of about 0.90 to 2.10 inches of water and constituting the sole source of conditioned air for each of said rooms, a conduit system formed entirely of air-conveying ducting extending from said generator means to each of said rooms for conveying the conditioned air as high-velocity confined and directed stream to said rooms and including downstream duct sections of uniform cross section forming the portions of the conduit system adjoining the rooms, a sound attenuator means of the same cross section as said duct sections coupled to each of said duct sections and serving as the end portion thereof, and an outlet fitting of the same cross section as said duct sections and said attenuator means connected to each of the respective attenuator means, said outlet fitting being located on any of the bounding surfaces of the associated room and defining a smooth, unobstructed, unencumbered substantially round outlet orifice providing a smooth, undiffused exit stream of conditioned air, said conditioned air being delivered to said outlet fitting with sufficient velocity and discharged therefrom in such manner to define a smooth, unencumbered and undiffused stream of conditioned air at acceptable acoustical noise levels wherein the stream is projected substantially perpendicularly from the adjacent boundary surface across the room at a distance approximating but slightly less than the distance to the opposing boundary surface with conservation of energy of the stream until it reaches a sufficient distance in the room to induce a moderate flow of substantially all the air in the room into intermingling relation therewith and thereby using the room as a mixing box to maintain desired room temperature and acoustically acceptable noise levels.

7. A high-velocity ducted air-type conditioning system as defined in claim 6, wherein each of said outlet fittings defines a round smooth exit orifice of cylindrical cross section which is unobstructed throughout its area and has a cross-sectional area of about 1.4 to 3.8 square inches.

8. A high-velocity ducted air-type conditioning system as defined in claim 6, wherein said conduit system comprises a first larger duct extending from the generator means defining a plenum and second branch ducts extending therefrom to said outlet fittings each of uniform small cross section of a size which can be accommodated in conventional stud building walls.

9. A high-velocity ducted air-type conditioning system ad defined in claim 7, wherein said conduit system comprises a first larger duct extending from the generator means defining a plenum and second branch ducts extending therefrom to said outlet fittings each of uniform small cross section of a size which can be accommodated in conventional stud building walls.

10. A high-velocity ducted air-type conditioning system as defined in claim 8, wherein said first larger duct is formed of a main trunk duct of about 7-inch internal diameter and said branch ducts are formed of about 2-inch diameter cylindrical tubing leading directly therefrom to the rooms to be conditioned.

11. A high-velocity ducted air-type conditioning system for acoustically acceptable comfort conditioning of each of a plurality of rooms each having boundary surfaces forming the floors, ceilings, and walls thereof wherein the sole supply of conditioned air in each room is a concentrated stream of such conditioned air introduced into each room through a soundattenuated outlet located in any of said boundary surfaces; the system comprising generator means for generating selectively conditioned air and pressurizing the same to form a single source of pressurized, conditioned air at a selected pressure within the range of about 0.90 to 2.10 inches of water and constituting the sole source of conditioned air for each of said rooms, a conduit system formed entirely of air-conveying ducting extending from said generator means to each of said rooms for conveying the conditioned air as high-velocity confined and directed streams from a selected location in the system to said rooms as uniform cross section airflow streams, an outlet fitting for each of the rooms for discharge of said airflow stream therethrough into the associated room, a sound attenuator means for the airflow stream to each room immediately upstream of and contiguous to each said outlet fitting for acoustically attenuating the airflow stream to the outlet fitting while maintaining the uniform cross section thereof without abrupt directional changes, transition, expansion or contraction, said outlet fitting being located on any of the bounding surfaces of the associated room and defining a smooth, unobstructed, unencumbered substantially round outlet orifice providing a smooth, undiffused exit stream of conditioned air, said conditioned air being delivered to said outlet fitting with sufficient velocity and discharged therefrom in such manner to define a smooth, unencumbered and undiffused stream of conditioned air at acceptable acoustical noise levels wherein the stream is projected substantially perpendicularly from the adjacent boundary surface across the room at a distance approximating but slightly less then the distance to the opposing boundary surface with conservation of the energy of the stream until it reaches a sufficient distance in the room to induce a moderate flow of substantially all the air in the room into intermingling relation therewith and thereby using the room as a mixing box to maintain desired room temperature and acoustically acceptable noise levels.

12. A high-velocity ducted air-type conditioning system for acoustically acceptable comfort conditioning of each of a plurality of rooms each having boundary surfaces forming the floors, ceilings, and walls thereof wherein the sole supply of conditioned air in each room is a concentrated stream of such conditioned air introduced into each room through a soundattenuated outlet located in any of said boundary surfaces; the

system comprising generator means for generating selectively conditioned air and pressurizing the same to fonn a single source of pressurized conditioned air at a selected pressure within the range of about 0.90 to 2.l inches of water and constituting the sole source of conditioned air for each of said rooms, a conduit system formed entirely of air-conveying ducting including a first plenum duct portion extending from said generator means and a plurality of flexible branch ducts of small enough diameter to be received between the wall surface portions of conventional stud building walls extending from the plenum duct portion to each of said rooms for conveying the conditioned air as high-velocity confined and directed streams from a selected location in the system to said rooms as uniform cross section airflow streams, an outlet fitting for each of the rooms for discharge of said airflow stream therethrough into the associated room, a sound attenuator stream therethrough into the associated room, a sound attenuator means for the airflow stream to each room immediately upstream of and contiguous to each said outlet fitting for acoustically attenuating the airflow stream to the outlet fitting while maintaining the uniform cross section thereof without abrupt directional changes, transition, expansion or contraction, said outlet fitting being located on any of the bounding surfaces of the associated room and defining a smooth, unobstructed, unencumbered substantially round outlet orifice providing a smooth, undiffused exit stream of conditioned air, said conditioned air being delivered to said outlet fitting with sufficient velocity and discharged therefrom in such manner to define a smooth, unencumbered and undiffused stream of conditioned air at acceptable acoustical noise levels wherein the stream is projected substantially perpendicularly from the adjacent boundary surface across the room at a distance approximating but slightly less than the distance to the opposing boundary surface with conservation of the energy of the stream until it reaches a sufficient distance in the room to induce a moderate flow of substantially all the air in the room into intermingling relation therewith and thereby using the room as a mixing box to maintain desired room temperature and acoustically acceptable noise levels.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,575,234 Dated April 20, 1971 Inventor(s) John J. Dieckmann It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

On the front page immediately below the line designated by data element [45] there should be inserted the following:

- [75] Assignee Dunham-Bush, Inc.

a corporation of Delaware-- Signed and sealed this 16th day of November 1971.

(SEAL) Attest:

EDWARD M.F'LETCHER, JR. ROBERT GOTTSCHALK Attesting Officer Acting Commissioner of Paten 

1. A method of obtaining an essentially uniform desired temperature throughout a room at an acceptable noise level without requiring air withdrawal means associated with the room, said method consisting of supplying conditioned air through an air supply duct system, injecting conditioned air from said duct system into the room solely as a single, sound-attenuated, undiffused, concentrated stream issuing from an unobstructed and unencumbered discharge opening in one of the bounding surfaces forming the floor, ceiling and walls of the room with the conditioned air being at a temperature substantially different from said desired temperature, said opening having the same cross-sectional area and configuration as the air supply duct connected thereto, acoustically attenuating the airflow to said opening immediately upstream of and contiguous to the opening while the flow is maintained as a uniform cross section flow stream without abrupt directional changes, transition, expansion or contraction, and issuing said acoustically attenuated flow stream from said opening as said concentrated airstream at a sufficient velocity to induce an air circulation pattern in the room solely by means of the concentrated airstream which effectively mixes conditioned air from said concentrated airstream with air in the room effectively using the room as a mixing box to achieve a substantially uniform temperature and acoustically acceptable noise level throughoUt the room.
 2. The method of claim 1 wherein said conditioned air is supplied from a plenum system which is maintained at a pressure of between 0.90 to 2.1 inches of water.
 3. The method of claim 2 wherein said conditioned air is in a temperature range of between 32* F. to 60* F.
 4. The method of claim 2 wherein said conditioned air is in a temperature of between 220* F. to 350* F.
 5. The method of claim 1, wherein the cross-sectional area of said concentrated airstream at said opening is about 1.4 to 3.8 square inches.
 6. A high-velocity ducted air-type conditioning system for acoustically acceptable comfort conditioning of each of a plurality of rooms each having boundary surfaces forming the floors, ceilings, and walls thereof wherein the sole supply of conditioned air in each room is a concentrated stream of such conditioned air introduced into each room through a sound-attenuated outlet located in any of said boundary surfaces; the system comprising generator means for generating selectively conditioned air and pressurizing the same to form a single source of pressurized, conditioned air at a selected pressure within the range of about 0.90 to 2.10 inches of water and constituting the sole source of conditioned air for each of said rooms, a conduit system formed entirely of air-conveying ducting extending from said generator means to each of said rooms for conveying the conditioned air as high-velocity confined and directed stream to said rooms and including downstream duct sections of uniform cross section forming the portions of the conduit system adjoining the rooms, a sound attenuator means of the same cross section as said duct sections coupled to each of said duct sections and serving as the end portion thereof, and an outlet fitting of the same cross section as said duct sections and said attenuator means connected to each of the respective attenuator means, said outlet fitting being located on any of the bounding surfaces of the associated room and defining a smooth, unobstructed, unencumbered substantially round outlet orifice providing a smooth, undiffused exit stream of conditioned air, said conditioned air being delivered to said outlet fitting with sufficient velocity and discharged therefrom in such manner to define a smooth, unencumbered and undiffused stream of conditioned air at acceptable acoustical noise levels wherein the stream is projected substantially perpendicularly from the adjacent boundary surface across the room at a distance approximating but slightly less than the distance to the opposing boundary surface with conservation of energy of the stream until it reaches a sufficient distance in the room to induce a moderate flow of substantially all the air in the room into intermingling relation therewith and thereby using the room as a mixing box to maintain desired room temperature and acoustically acceptable noise levels.
 7. A high-velocity ducted air-type conditioning system as defined in claim 6, wherein each of said outlet fittings defines a round smooth exit orifice of cylindrical cross section which is unobstructed throughout its area and has a cross-sectional area of about 1.4 to 3.8 square inches.
 8. A high-velocity ducted air-type conditioning system as defined in claim 6, wherein said conduit system comprises a first larger duct extending from the generator means defining a plenum and second branch ducts extending therefrom to said outlet fittings each of uniform small cross section of a size which can be accommodated in conventional stud building walls.
 9. A high-velocity ducted air-type conditioning system ad defined in claim 7, wherein said conduit system comprises a first larger duct extending from the generator means defining a plenum and second branch ducts extending therefrom to said outlet fittings each of uniform small cross section of a size which can be accommodated in conventional stud building walls.
 10. A high-velocity ducted air-type conditioning system as defined in claim 8, wherein said first larger duct is formed of a main trunk duct of about 7-inch internal diameter and said branch ducts are formed of about 2-inch diameter cylindrical tubing leading directly therefrom to the rooms to be conditioned.
 11. A high-velocity ducted air-type conditioning system for acoustically acceptable comfort conditioning of each of a plurality of rooms each having boundary surfaces forming the floors, ceilings, and walls thereof wherein the sole supply of conditioned air in each room is a concentrated stream of such conditioned air introduced into each room through a sound-attenuated outlet located in any of said boundary surfaces; the system comprising generator means for generating selectively conditioned air and pressurizing the same to form a single source of pressurized, conditioned air at a selected pressure within the range of about 0.90 to 2.10 inches of water and constituting the sole source of conditioned air for each of said rooms, a conduit system formed entirely of air-conveying ducting extending from said generator means to each of said rooms for conveying the conditioned air as high-velocity confined and directed streams from a selected location in the system to said rooms as uniform cross section airflow streams, an outlet fitting for each of the rooms for discharge of said airflow stream therethrough into the associated room, a sound attenuator means for the airflow stream to each room immediately upstream of and contiguous to each said outlet fitting for acoustically attenuating the airflow stream to the outlet fitting while maintaining the uniform cross section thereof without abrupt directional changes, transition, expansion or contraction, said outlet fitting being located on any of the bounding surfaces of the associated room and defining a smooth, unobstructed, unencumbered substantially round outlet orifice providing a smooth, undiffused exit stream of conditioned air, said conditioned air being delivered to said outlet fitting with sufficient velocity and discharged therefrom in such manner to define a smooth, unencumbered and undiffused stream of conditioned air at acceptable acoustical noise levels wherein the stream is projected substantially perpendicularly from the adjacent boundary surface across the room at a distance approximating but slightly less then the distance to the opposing boundary surface with conservation of the energy of the stream until it reaches a sufficient distance in the room to induce a moderate flow of substantially all the air in the room into intermingling relation therewith and thereby using the room as a mixing box to maintain desired room temperature and acoustically acceptable noise levels.
 12. A high-velocity ducted air-type conditioning system for acoustically acceptable comfort conditioning of each of a plurality of rooms each having boundary surfaces forming the floors, ceilings, and walls thereof wherein the sole supply of conditioned air in each room is a concentrated stream of such conditioned air introduced into each room through a sound-attenuated outlet located in any of said boundary surfaces; the system comprising generator means for generating selectively conditioned air and pressurizing the same to form a single source of pressurized conditioned air at a selected pressure within the range of about 0.90 to 2.10 inches of water and constituting the sole source of conditioned air for each of said rooms, a conduit system formed entirely of air-conveying ducting including a first plenum duct portion extending from said generator means and a plurality of flexible branch ducts of small enough diameter to be received between the wall surface portions of conventional stud building walls extending from the plenum duct portion to each of said rooms for conveying the conditioned air as high-velocity confined and directed streams from a selected location in the system to saId rooms as uniform cross section airflow streams, an outlet fitting for each of the rooms for discharge of said airflow stream therethrough into the associated room, a sound attenuator stream therethrough into the associated room, a sound attenuator means for the airflow stream to each room immediately upstream of and contiguous to each said outlet fitting for acoustically attenuating the airflow stream to the outlet fitting while maintaining the uniform cross section thereof without abrupt directional changes, transition, expansion or contraction, said outlet fitting being located on any of the bounding surfaces of the associated room and defining a smooth, unobstructed, unencumbered substantially round outlet orifice providing a smooth, undiffused exit stream of conditioned air, said conditioned air being delivered to said outlet fitting with sufficient velocity and discharged therefrom in such manner to define a smooth, unencumbered and undiffused stream of conditioned air at acceptable acoustical noise levels wherein the stream is projected substantially perpendicularly from the adjacent boundary surface across the room at a distance approximating but slightly less than the distance to the opposing boundary surface with conservation of the energy of the stream until it reaches a sufficient distance in the room to induce a moderate flow of substantially all the air in the room into intermingling relation therewith and thereby using the room as a mixing box to maintain desired room temperature and acoustically acceptable noise levels. 